Erdoğan opens final stretch of Istanbul Airport metro

President Recep Tayyip Erdoğan has inaugurated the final section of Istanbul’s M11 metro, completing a 69 kilometre line that now links the western district of Halkalı with Istanbul Airport and the central business hub of Gayrettepe in a single continuous route.

Longest and fastest link in Turkey’s metro network

The opening of the Halkalı–Arnavutköy segment brings the Gayrettepe–Istanbul Airport–Halkalı line to full length, creating what local coverage describes as one of Turkey’s longest and fastest metro corridors. The line was developed as the dedicated rail backbone for Istanbul Airport and has been opening in stages over several years.

With the final section now in service, passengers can board in Halkalı, a fast‑growing residential and commercial hub on Istanbul’s European side, and travel by metro all the way to the airport and on to Gayrettepe, an interchange close to some of the city’s key business districts. Reports indicate that journey times between Halkalı and Gayrettepe are expected to be under one hour once timetables settle.

The M11 line has been promoted as a high‑speed urban rail corridor, designed for operating speeds significantly higher than older metro lines in the city. Publicly available information highlights train speeds of up to 120 kilometres per hour on dedicated tracks, allowing the line to compete with highway travel while avoiding Istanbul’s well‑known congestion.

According to Turkish media reports, the inauguration of the last section also confirms the strategic intention to position Istanbul Airport as the centre of a wider regional transport network, with the metro line marketed domestically as a flagship infrastructure project.

Direct airport access reshapes travel across the city

The completion of the M11 has immediate consequences for airport access. Until now, many international visitors connected by bus, taxi or private transfer from central districts such as Taksim and Beşiktaş. With the line fully open, travellers can now reach the airport through a single continuous metro journey that connects with several existing urban rail routes.

From Gayrettepe, passengers can transfer to the M2 metro, which runs through central business and tourism areas on the European side. From Halkalı, the new terminus links to suburban rail services that connect further into Istanbul’s western districts and to the Marmaray corridor, extending cross‑Bosphorus connections toward the Asian side.

Travel industry observers expect the line to be particularly attractive for visitors arriving during peak traffic periods, when road journeys between the airport and the city centre can vary widely in duration. Consistent journey times by rail, typically around 30 minutes from Gayrettepe to the airport according to previously published figures for the earlier section of the route, are being presented as a key selling point for the new service.

For Istanbul residents, the airport metro also changes commuting patterns to large employment centres in and around the airport zone. Reports suggest that the extension is likely to support further development of logistics, aviation services and hospitality businesses clustered along the corridor.

Opening follows phased roll‑out and test closures

The full launch of the Halkalı connection follows a phased roll‑out of the M11 line. Earlier stages brought the line first from the airport to Kağıthane and later to Gayrettepe, gradually integrating the new airport into the wider metro network. Each opening was accompanied by adjustments to feeder bus routes and other public transport services to reflect the new rail capacity.

In the weeks leading up to the latest inauguration, sections of the line were temporarily closed for testing and integration of the new segment. Public announcements highlighted short‑term suspensions between June 13 and 19 to allow final checks, software updates and trial operations over the extended route.

Reports from Turkish transport and infrastructure outlets indicate that the final tests focused on signalling, safety systems and the coordination of train paths over the full 69 kilometre length. The line is described as operating with advanced automation, enabling high frequencies while maintaining strict control over speeds on the long airport approaches.

The staged approach has allowed operators to monitor passenger volumes and adjust service intervals over time. Early figures reported in local media after the opening of the Halkalı–Arnavutköy section suggested tens of thousands of passengers using the line in a single day, with ridership expected to rise as more travellers become aware of the direct airport link.

New connections and interchanges for visitors

For international travellers, the completed M11 line simplifies route planning within Istanbul. From the airport, visitors can now ride directly to Gayrettepe and transfer to other high‑frequency lines reaching neighbourhoods including Taksim, Şişli and the historic peninsula, with at least one interchange required depending on the destination.

At the western end, Halkalı functions as a major interchange node with commuter rail and regional services. This opens possibilities for travellers heading to hotels and residential districts in Küçükçekmece, Başakşehir and other rapidly growing neighbourhoods that previously required a mix of buses and road transfers from the airport.

Publicly available information from municipal documents and transport briefings notes that the Gayrettepe and Halkalı interchanges are intended to spread passenger flows more evenly across the network. By providing two strong end points for the airport line, planners aim to reduce pressure on central hubs that have historically handled most long‑distance transfers.

Travel industry platforms have begun updating their guidance for visitors, highlighting the metro as a cost‑effective alternative to taxis for solo travellers and small groups, especially during busy seasons when road congestion and transfer prices tend to increase.

Strategic boost for Istanbul’s global connectivity

The inauguration of the final M11 section carries wider significance for Turkey’s transport strategy. Istanbul Airport was conceived as a global aviation hub, and direct, high‑capacity rail access is viewed in publicly available planning materials as essential for sustaining growth in passenger numbers and airline operations.

By tying the airport more tightly into the fabric of the city, the completed metro line is expected to make early‑morning and late‑night flights more accessible to residents, airport workers and connecting passengers. This could influence airline scheduling and route development decisions in the medium term.

The project also reinforces Istanbul’s efforts to expand its rail‑based public transport share relative to private car use. Over the past decade, the city has steadily extended its metro and tramway network, and the M11 adds a high‑profile international element to that expansion, comparable in scale to airport express services in other major world cities.

For travellers, the practical result is a more predictable, rail‑based option for reaching one of Europe’s busiest aviation gateways. As the line settles into regular operation and service frequencies increase, the Gayrettepe–Istanbul Airport–Halkalı metro is expected to become a central feature of how both residents and international visitors navigate Turkey’s largest city.